/* 全局样式设置 */
body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f8f9fa;
}

/* 主容器样式 */
.main-container {
  display: flex;
  min-height: 100vh;
}

/* 左侧菜单区域样式 */
.left-menu-section {
  background-color: #343a40;
  color: white;
  width: 20%;
  padding: 20px;
  box-sizing: border-box;
}

.left-menu-section h2 {
  margin-top: 0;
  border-bottom: 1px solid #495057;
  padding-bottom: 10px;
}

.left-menu-list {
  list-style-type: none;
  margin-top: 20px;
  padding: 0;
  font-family: "Microsoft Yahei";
}

.left-menu-list li {
  padding: 10px 0;
  border-bottom: 1px solid #495057;
}

.left-menu-list a {
  text-decoration: none;
  color: inherit;
  display: block;
  transition: color 0.3s ease;
}

.left-menu-list a:hover {
  color: #adb5bd;
}

/* 右侧功能区域样式 */
.right-function-section {
  background-color: #f4f4f4;
  width: 80%;
  padding: 20px;
  box-sizing: border-box;
}

.right-function-section h2 {
  margin-top: 0;
  border-bottom: 1px solid #ccc;
  padding-bottom: 10px;
}

.right-nav {
  background-color: #333;
  border-radius: 5px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.right-nav-list {
  list-style-type: none;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: space-around;
}

.right-nav-list li {
  padding: 15px 20px;
}

.right-nav-list a {
  text-decoration: none;
  color: white;
  font-weight: bold;
  transition: color 0.3s ease;
}

.right-nav-list a:hover {
  color: #ccc;
}

/* iframe样式 */
#contentFrame {
  margin-top: 20px;
  width: 100%;
  height: 89%;
  border: 1px solid #ccc;
  box-sizing: border-box;
}